#C P24 tub puffer that illustrates period doubling.
#C (David Bell, November 1999)
x = 143, y = 138
140bobo$141b2o$141bo22$116bobo$117b2o$117bo22$92bobo$93b2o$93bo22$68bo
bo$69b2o$69bo22$44bobo$45b2o$45bo21$34b2o$32b2ob2o$32b4o$17b2o14b2o$
16bo2bo$3b2o11bo6bo$bo2bo11bo3bob3o7bo$o4bo2b2o6bo3bo11b2o$b3o4b2o6b4o
b3obo7b2o$16b6ob4o5b2o$17b3o5bo$18bo3$28b5o$27bo4bo$32bo$27bo3bo$29bo!